US PATENT SUBCLASS 418 / 38
.~.~ Cam controlled working member movement

Current as of: June, 1999
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418 /   HD   ROTARY EXPANSIBLE CHAMBER DEVICES

33  DF  INTERMITTENTLY ACCELERATED AND RECEDING MEMBERS ROTATE IN SAME PATH (ALTERNATING PISTON TYPE) {2}
35  DF  .~ Each a working member {3}
38.~.~ Cam controlled working member movement

DEFINITION

Classification: 418/38

(under subclass 35) Apparatus in which working member movement is controlled by coacting elements one of which has a surface or groove of irregular contour for controlling the movements of the other elements and the working member associated therewith.